The second Caltech-Jodrell Bank VLBI survey. 1: Observations of 91 of 193 sources

Creators: Taylor, G. B.; Vermeulen, R. C.; Pearson, T. J.; Readhead, A. C. S.; Henstock, D. R.; Browne, I. W. A.; Wilkinson, P. N.

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Abstract

We define the sample for the second Caltech-Jodrell Bank very long base interferometry (VLBI) survey. This is a sample of 193 flat- or gigahertz-peaked-spectrum sources selected at 4850 MHz. This paper presents images of 91 sources with a resolution of approximately 1 mas, obtained using VLBI observations at 4992 MHz with a global array. The remaining images and the integrated radio spectra will be presented in a forthcoming paper by Henstock et al.

Additional Information

© 1994 The American Astronomical Society. Received 1994 April 26; accepted 1994 May 20. We thank the staffs at the observatories that took part in these observations and the staff of the JPL/Caltech Block II Correlator for their assistance. We thank R. McMahon for undertaking the APM scanning of the POSS plates and J. Douglas for supplying 365 MHz flux densities prior to publication. We also thank M. Shepherd for writing DIFMAP and for the many modifications he made on our behalf. The work done by the Caltech group was supported by NSF grant AST-9117100. D. R. H. gratefully acknowledges the receipt of a SERC research studentship. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, Caltech, under contract with the National Aeronautics and Space Administration.

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